 p {


     @if 1+1==2 {
         border: 1px solid;
     }


     @if 5 < 3 {
         border: 2px dotted;
     }

     @if 5>6 {
         border: 4px dotted;
     }


     /*!@if null {
         border: 3px double;
     }*/

 }